Toast the coriander seeds, cumin seeds, fennel seeds, mustard seeds, black peppercorns, and fenugreek seeds in a dry skillet over medium heat until fragrant, about 2-3 minutes.
Transfer the toasted spices to a spice grinder or mortar and pestle and grind them into a fine powder.
Add the dried red chilies, cinnamon stick, green cardamom pods, and cloves to the spice grinder or mortar and pestle and grind them into a fine powder as well.
Mix the ground spices together in a small bowl, then stir in the turmeric powder, ground ginger, and ground nutmeg.
Store the curry masala seasoning in an airtight container in a cool, dry place for up to 6 months.
This curry masala seasoning is perfect for adding flavor to all sorts of dishes, including curries, roasted vegetables, soups, and more. Enjoy!